Original Article

SHR3824, a novel selective inhibitor of renal sodium glucose cotransporter 2, exhibits antidiabetic efficacy in rodent models

Authors: Pang-ke Yan, Li-na Zhang, Ying Feng, Hui Qu, Li Qin, Lian-shan Zhang, Ying Leng
DOI: 10.1038/aps.2013.196

Abstract

Pang-ke YAN1, Li-na ZHANG1, Ying FENG1, Hui QU1, Li QIN1, Lian-shan ZHANG2, Ying LENG1, *
1State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; 2Shanghai Hengrui Pharmaceuticals Co, Ltd, Shanghai 200245, China

Aim: The sodium glucose cotransporter 2 (SGLT2) plays an important role in renal glucose reabsorption, thus serves as a new target for the treatment of diabetes. The purpose of this study was to evaluate SHR3824 as a novel selective SGLT2 inhibitor and to characterize its in vivo effects on glucose homeostasis. The effects of chronic administration of SHR3824 on peripheral insulin sensitivity and pancreatic β-cell function were also investigated.

Methods: The in vitro potency and selectivity of SHR3824 were assessed in HEK293 cells transfected with human SGLT2 or SGLT1. Acute and multi-dose studies were performed on ICR mice, GK rats and db/db mice to assess the ability of SHR3824 to enhance urinary glucose excretion and improve blood glucose levels. 2-Deoxyglucose uptake and insulin immunohistochemical staining were performed in the soleus muscle and pancreas, respectively, of db/db mice. A selective SGLT2 inhibitor BMS512148 (dapagliflozin) was taken as positive control.

Results: SHR3824 potently inhibited human SGLT2 in vitro, but exerted much weak inhibition on human SGLT1 (the IC50 values of SHR3824 against human SGLT2 and SGLT1 were 2.38 and 4324 nmol/L, respectively). Acute oral administration of SHR3824 (0.3, 1.0, 3.0 mg/kg) dose-dependently improved glucose tolerance in ICR mice, and reduced hyperglycemia by increasing urinary glucose excretion in GK rats and db/db mice. Chronic oral administration of SHR3824 (0.3, 1.0, 3.0 mg·kg-1·d-1) dose-dependently reduced blood glucose and HbA1c levels in GK rats and db/db mice, and significantly increased insulin-stimulated glucose uptake in the soleus muscles and enhanced insulin staining in the islet cells of db/db mice.

Conclusion: SHR3824 is a potent and selective SGLT2 inhibitor and exhibits antidiabetic efficacy in several rodent models, suggesting its potential as a new therapeutic agent for the treatment of type 2 diabetes.


Keywords: sodium glucose cotransporter 2 (SGLT2); SHR3824; dapagliflozin; type 2 diabetes mellitus; blood glucose; insulin sensitivity; β-cell function

This work was financially supported by the National Natural Science Foundation of China (30973543, 81173075, 81202541, and 81330081), the Anhui Provincial Natural Science Foundation (1208085QH146), the Grants for Scientific Research of BSKY (XJ201213), the Foundation for Young Academic Backbone of Anhui Medical University, and the Grants for Young Talents of Anhui Medical University (2013).
* To whom correspondence should be addressed.
E-mail yleng@mail.shcnc.ac.cn
Received 2013-11-20 Accepted 2013-12-30
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